I agree, but using terms like Traditional and Folk isn't going to help your cause. Sometimes it comes down to very specific definitions, like paticular songs and singers, regions, traditions, artists and albums, periods, all of which are mutable for sure. In this thing called Folk, that mutability is often resisted, even though the snap-shot we have of The Tradition at the overall point of its collection indicates a vast & mutable beast in which songs may assume innumerable variations even to the point of certain variants being the product of one particular performance. If, on the other hand, all it comes down to wanting things to stay the same then there's scope for that in the Revival too I reckon!

If someone asks me What is Folk? then I'll point them to the million categories of music covered by the term and let them figure it out for themselves. Likewise Rock, Pop, Jazz and Classical. But let's hope Traditional means something more than simply being Old Fashioned, eh? All music has Roots; wouldn't be music without them. It's a language, it's how it works.